Share Email Print
cover

Proceedings Paper

Remote ultrasensitive laser microphone
Author(s): G. Sánchez Guerrero; C. Guajardo Gonzáles; P. Viera González; R. Selvas; L. Ramos Traslosheros
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

This paper presents an optical fiber Mach-Zehnder interferometer configured as an ultra-sensitive sound detector. We used a 633nm, 0.5 mW, He-Ne laser, two 3dB couplers, a few meter of telecomm fiber, an U-bench mount to increase the sensitivity of the device and an acquisition system composed by a photodiode and an amplifier connected to a laptop and to an oscilloscope. The optoelectronic device enables us to record acoustic signals from sources at distances longer than 4 meters, converting the interference patterns induced by the sound waves into a digital signal. The ease of its applicability, thanks to its small size and low weight, and its ultra-sensitivity makes this laser microphone a very attractive solution to issues such as monitoring, no-detectable sensing and perimeter protection.

Paper Details

Date Published: 16 September 2011
PDF: 9 pages
Proc. SPIE 8133, Dimensional Optical Metrology and Inspection for Practical Applications, 81330Y (16 September 2011); doi: 10.1117/12.894499
Show Author Affiliations
G. Sánchez Guerrero, Univ. Autónoma de Nuevo León (Mexico)
C. Guajardo Gonzáles, Univ. Autónoma de Nuevo León (Mexico)
P. Viera González, Univ. Autónoma de Nuevo León (Mexico)
R. Selvas, Univ. Autónoma de Nuevo León (Mexico)
L. Ramos Traslosheros, Univ. Autónoma de Nuevo León (Mexico)


Published in SPIE Proceedings Vol. 8133:
Dimensional Optical Metrology and Inspection for Practical Applications
Kevin G. Harding; Peisen S. Huang; Toru Yoshizawa, Editor(s)

© SPIE. Terms of Use
Back to Top